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Microchip Technology 1N5350E3/TR12
- Part No.:
- 1N5350E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5350E3/TR12.pdf
- Description:
- DIODE ZENER 13V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,806
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Product details
Overview
1N5350E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 11 V, ±5% tolerance (B-suffix equivalent), 2.5 Ω maximum dynamic impedance at 100 mA test current, and 8.0 A maximum surge current capability. It operates across –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5350E3/TR12 datasheet, 1N5350E3/TR12 pinout, 1N5350E3/TR12 application, or 1N5350E3/TR12 equivalent, key selection criteria include Zener voltage stability under varying load current, low dynamic impedance for tight regulation, thermal resistance performance on FR4 PCBs, and RoHS-compliant matte-tin lead plating compatibility with standard reflow profiles.
Technical Context
The 1N5350E3/TR12 functions as a two-terminal voltage regulator operating in reverse-bias breakdown mode. Its regulation behavior is defined by a sharp knee at ~11 V with 0.25 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, and it maintains stable operation up to 150°C junction temperature.
It features a T-18 axial package with cathode band marking, void-free thermosetting epoxy body (UL94V-0), and leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026. Thermal resistance is 85°C/W junction-to-ambient on FR4 with specified copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal at 100 mA test current - defines precise regulation point for feedback networks |
| Tolerance | ±5% - ensures output voltage stays within 10.45–11.55 V under production variation |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT = 100 mA - minimizes output voltage shift with load current changes |
| Max Surge Current (IZSM) | 8.0 A peak (8.3 ms half-sine) - withstands transient overloads without degradation |
| Power Dissipation | 5.0 W at TL = 25°C (3/8″ lead length) - requires heat sinking above ambient derating threshold |
| Thermal Resistance | 85°C/W junction-to-ambient on FR4 (1 oz Cu, 4 mm² pad) - determines safe continuous current on PCB |
| Voltage Regulation (ΔVZ) | 0.25 V max - difference between VZ measured at 10% and 50% of IZM, indicating line regulation quality |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free thermosetting epoxy, UL94V-0), cathode indicated by color band. Leads are RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference terminal | Connected to lower-potential node (e.g., ground or feedback divider low-side); current flows into cathode during regulation |
| Cathode | Zener voltage reference terminal | Banded end; connected to regulated node (e.g., feedback input of controller IC); defines 11 V reference relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction | e3 suffix confirms lead-free matte-tin plating and halogen-free epoxy - meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack |
| High surge current rating | 8.0 A non-repetitive peak (8.3 ms half-sine) - enables robust transient suppression in DC-DC converter inputs |
| Low dynamic impedance | 2.5 Ω max at 100 mA - delivers <12 mV output shift per 30 mA load change, critical for stable feedback |
| Wide temperature operation | –65°C to +150°C storage and operating range - supports industrial and automotive under-hood applications |
| Stable voltage regulation | 0.25 V ΔVZ across 10–50% of IZM - ensures consistent reference accuracy despite current variation in linear regulators |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-based feedback loop of isolated flyback converters to regulate output voltage. IC Role / Device Role / Timing Role: Provides precise 11 V reference to TL431 shunt regulator or directly biases optocoupler LED. Use Value: Low ΔVZ (0.25 V) and 2.5 Ω ZZ ensure feedback voltage remains stable across line/load transients, improving output regulation to ±1.5%. | Use Scenario: Placed across DC bus rails to clamp voltage spikes caused by inductive switching or lightning surges. IC Role / Device Role / Timing Role: Acts as passive crowbar element that conducts when rail exceeds 11.55 V (VZ + tolerance). Use Value: 8.0 A surge rating allows absorption of 100 J transients (per IEC 61000-4-5) without failure, protecting downstream MOSFETs and controllers. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Paired with series resistor to generate stable bias voltage for op-amp input stages or ADC reference buffers. IC Role / Device Role / Timing Role: Serves as two-terminal shunt reference with predictable VZ drift vs. temperature (–1.5 mV/°C typical). Use Value: ±5% tolerance and 0.25 V regulation window enable accurate 11 V references without trimming, reducing BOM count in sensor signal chains. | Use Scenario: Configured in constant-current sink topology using external resistor to bias laser diodes or RF amplifiers. IC Role / Device Role / Timing Role: Maintains fixed voltage drop to set emitter/base bias current in transistor current sources. Use Value: 2.5 Ω ZZ ensures current stability better than ±2% over 50–150 mA range, critical for analog front-end linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5350B | Same electrical specs but SnPb lead finish (non-RoHS); no e3 suffix; identical T-18 package and pinout | Not suitable for RoHS-compliant production; requires exemption documentation for EU/China markets | Select 1N5350B only for legacy repair or non-regulated environments where lead-free is not mandated |
| MMSZ5242BT1G | Surface-mount SOD-123 package; 12 V nominal, ±5%; 500 mW rating; 17 Ω ZZ; 1.0 A surge | Lower power and higher impedance limit use to low-current references (<10 mA); unsuitable for surge clamping | Choose MMSZ5242BT1G only for space-constrained PCBs where 5 W dissipation is unnecessary and thermal mass is limited |
Compared with 1N5350B and MMSZ5242BT1G, the 1N5350E3/TR12 uniquely combines RoHS compliance, 5 W power handling, low 2.5 Ω impedance, and axial through-hole mounting - making it optimal for high-reliability industrial power supplies requiring field-serviceable components and robust transient immunity.
Availability
1N5350E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage protection clamping, and programmable voltage reference applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N5350E3/TR12 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5350E3/TR12?
The 1N5350E3/TR12 has a ±5% Zener voltage tolerance, confirmed by its "B"-equivalent specification in the Microsemi datasheet and consistent with the e3 RoHS-compliant variant of the 1N5350B family. This means its actual regulation voltage falls between 10.45 V and 11.55 V at 100 mA test current and 25°C lead temperature. The tolerance is guaranteed across the full operating temperature range of –65°C to +150°C, and the 1N5350E3/TR12 maintains this spec without derating.
Does the 1N5350E3/TR12 require dry-pack packaging due to moisture sensitivity?
No, the 1N5350E3/TR12 does not require dry-pack packaging. It carries IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1 rating, meaning it is non-hygroscopic and can be stored indefinitely at ambient conditions without baking prior to assembly. This is enabled by its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating, both verified in Microsemi's qualification testing for the 1N53xx series.
What is the maximum continuous DC current the 1N5350E3/TR12 can handle on a standard FR4 PCB?
The 1N5350E3/TR12 supports a maximum continuous DC current of approximately 175 mA when mounted on a standard FR4 PCB (1 oz Cu, 4 mm² copper pad, 1 mm track width, 25 mm length), based on its 85°C/W junction-to-ambient thermal resistance and 5.0 W power rating derated to 1.47 W at 25°C ambient. Exceeding this current risks junction temperature exceeding 150°C, triggering thermal runaway. For higher currents, forced air or metal-core PCBs are required.
Can the 1N5350E3/TR12 be used as a replacement for the 1N5350B in existing designs?
Yes, the 1N5350E3/TR12 is a direct form-fit-function replacement for the 1N5350B, sharing identical electrical specifications (11 V ±5%, 2.5 Ω ZZ, 8.0 A surge), T-18 package dimensions, and axial lead configuration. The only difference is RoHS-compliant matte-tin plating versus SnPb on the 1N5350B. No PCB layout or schematic changes are needed, though reflow profile adjustments may be required to accommodate the higher melting point of lead-free solder.
What is the forward voltage specification for the 1N5350E3/TR12?
The forward voltage of the 1N5350E3/TR12 is specified as ≤1.2 V at 1.0 A forward current, per Microsemi's absolute maximum ratings table. This parameter applies only when the device is operated in forward conduction mode (anode positive relative to cathode), which is not its intended use case. In normal Zener regulation operation, the device remains reverse-biased, and forward voltage is relevant only for polarity-check circuits or ESD protection paths where forward conduction may occur.
1N5350E3/TR12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5350E3/TR12 FAQ
1.How can I place an order for 1N5350E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5350E3/TR12 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5350E3/TR12 reliable?
The price and inventory of 1N5350E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5350E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5350E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5350E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5350E3/TR12?
1N5350E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5350E3/TR12 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5350E3/TR12?
For technical support, including 1N5350E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5350E3/TR12 requirements.
6.How does Aetrix verify that 1N5350E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5350E3/TR12 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5350E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5350E3/TR12?
All 1N5350E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5350E3/TR12, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5350E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5350E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5350E3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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